A Theoretical and Experimental Study of the Transformational Process of Iconic and Verbal Information in Audiovisual Instructional Materials

本研究旨在发展一种视听教学材料的图像和言语信息加工的分析技术。对53个国内外教育电视节目进行了听觉和视觉的不同类别的分析。发送者要传达的信息量被假定为与每个镜头的呈现时间长度成比例，因此以秒为单位测量的镜头长度由听觉和视觉呈现时间分量组成。引入复合指数模型来近似各种分布的镜头长度的视频节目中的两个参数α和β分别与听觉和视觉呈现时间分量。所有程序的理论分布和观测分布之间的一致性非常好。为了探讨这两个参数的实际意义，定性和定量分析， ...更多信息 从演讲者的数量、主题内容、演讲的相对数量和“媒体复杂性”四个方面进行了鞋子的调查。这些发现对视听模态的双成分指数模型是相当有益的。为了方便镜头分析技术和视频节目中画面的时间采样，还开发了一个多画面显示系统，它可以同时显示16个分割画面。基于双分量指数模型，推导出了等时间间隔时间抽样抽样的镜头百分比估计理论公式，该公式发现所有程序的期望值与观测值之间具有良好的一致性。对于大多数程序，超过95%的镜头是通过时间采样技术以小于5秒的间隔获得的。讨论和尝试了这种多画面呈现技术在教学活动研究中的各种应用。少

The present study aimed at developing an analytical technique of audiovisual instructional materials in terms of iconic and verbal information processing. Fifty-three Japaneses and foreign educational TV programs were analyzed into auditory and visual components of different categories. The amount of information intended to convey by the sender was assumed to be proportional to the time length of presentation for each shot, so that a shot length measured in second is composed of auditory and visual presentation time components. A compound exponential model was introduced to approximate a variety of distributions of shot lengths of the video programs in terms of the two parameters alpha and beta respectively related to the auditory and visual presentation time components. The agreement between the therectical and the observed distributions for all the programs was very good. In order to explore the practical implications of the two parameters, qualitative as well as quantitative analysi … More s of shoes was carried out in terms of number of presenters, content of subject, relative amount of lecture presentation and "media complexities". All these findings were fairly conducive to the two component exponential model of audiovisual modalities. A multipicture display system which enables to present 16 partitioned pictures simultaneously was also developed to facilitate shot analytic technique and time sampling of pictures from video programs. Based on the two component exponential model, a theoretical formula for estimating the percentage of shots sampled by the time sampling with equal time intervals was derived and the formula found an excellent agreement between the expected and the observed values for all the programs. For most programs more than 95% of the shots were secured by the time sampling technique with less than 5 second intervals. Various applications of this multipicture presentation technique to the study of teaching-learning activities were discussed and attempted. Less